INVESTIGADORES
QUINTEROS Cynthia Paula
congresos y reuniones científicas
Título:
Brazil, Uruguay and Argentina joint observation of March 2009 equinox
Autor/es:
CAMINO, GANGUI, SANCHEZ, STEFFANI, SARAIVA, CORTELLINI ABRAHÃO, CUNHA FERREIRA, GIOVANNINI JUNIOR, GOMEZ, KANAAN, BRUSCATO, MARTINEZ, TERMINIELLO, DICOVSKIY, BONÁN, FEU, IGLESIAS, LUJÁN, MÉNDEZ, SUÁREZ, QUINTEROS, ET AL.
Lugar:
Rio de Janeiro, Brasil
Reunión:
Otro; Astronomy Education between Past and Future, XXVII General Assembly of the International Astronomical Union; 2009
Institución organizadora:
International Astronomical Union
Resumen:
This year, March equinox took place on the 20th, at 11:44 (GMT). For
this occasion, a didactic activity on topics of Astronomy,
coordinatedand carried out at the same time in nine cities of
Argentina, Brazil and Uruguay, has been organized. The idea for this
project wasdeveloped by the Task Group on Astronomy Teaching at the
CTS4 Meeting (Ciência, Tecnologia e Sociedade IV), which took place in
Porto Alegre in November 2008.Professors and researchers in Astronomy
Teaching took part together with their students, mainly pre-service
elementary and secondary level teacher students, measuring the shadows
cast by several vertical gnomons and materializing sun rays passing
through the top of the gnomon by means of threads. Parallel Earth
globes were utilized in each location too, so as everyone could
visualize in real time its local position as well as a planetary
perspective which included the rest of the partners, materialized by
small sticks as gnomons in each place.The activity allowed us to
explore concepts such as local horizon, local meridian, cardinal
points, astronomical latitude, equinoxes and solstices, plane of
Celestial Equators local projection, differences between solar and
mean time, etc. The educational key of this activity is the
observational 3D treatment of those concepts, very different from a
more classical and sole theoretical approach.The experiments performed
by many groups in different cities emphasized aspects that are
characteristic to each place (times of solar noon, length of the
shadows, inclination of equatorial planes, etc.) and others that are
common to all, such as the straight line followed by the tip of the
shadow on that date, which materializes the East-West line, length of
day and night, points of sunrise and sunset on the local horizon,
etc.We here report the main aims of the activity, details of the
measurements and some of the results obtained by the different groups
in the three countries, as well as a comparison amongst not only the
astronomical aspects of this experience but of the social and
educational ones as well. [31 authors from 3 different countries in
total.]